Excavating apparatus



2 Sheets-Sheet 1 l 0. ,l l f ,In /l/ l lll/f ///////////l///l// J. W. PAGE EXCAVATING APPARATUS Filed March '7, 1930 @Wam 5m April 21, 1931.

Aprirzl, 1931. J w, PAGE 1,802,063

EXCAVATING APPARATUS Filed March 7. 1930 2 Sheets-Sheet 2 @www @mig/w Patented Apr. 21, 1931 i y 1 p i 'Y i i i UNITED 4STATES PATENT orrics i Application filed March 7, 1930. Serial No. 433,925.

. This invention relates to improvementsy in the platform lOvwith a double sheave 22at excavating ap'paratusfand, more especially, to its 'apelal ".Theupper ond of the arm 17 ,ifs

such apparatus sometimes referred to as a also provided with atriple--sheave 23. n. Y

' drag shovel,trench hoe, or similar device,fcon The bucket 19fcarr'ies'on top a plate24, 1 5 structed to dig toward the operatorscab in-` substantially in line with .the pivot 20 and be- T55' steadof away fromitf; f f f hind the same. This plate is provided with My improved apparatus 1s ofthe samegen-V a series` (hereshown as three) of perfora-V Y -V eral type a'sthat shown in myUnited States tions, or eyes, for. attaching the ends of the patent, No. 1,724,104, issuedA'ugust 13, 1929, boom line or hoist line), and the dump lin l and hascertain improvements over the .appato be hereinafter described. 160 ratus therein shown. In this specification, I Numeral 25 indicates Aa vlinewhich I may shall more particularly point. out such imherein call theboom line, although in prac'- y provements, it being'understood that, in other tice the same `is, sometimes referred to as the respects, the construction and operation, inV hoist line. This linehas one-end attached 1.1i general, resemble that ofl the'apparatus shown to the winch, or windingdrum 252.011 the G5 in the earlier patent referred to. v platform 10. This line25 extendsfrom the In thoseforms of devices embodyingjthe windingdrum 25a up over'one of the V,sheaves Y features of my invention shown in thefaccom- 22 at the top of the frame 21, thence over one l`panying drawingsof the sheaves 23 atthe upper end of the arm Figurezl is a viewin side elevation; and 17 thence down-'and around'the sheave 23a, i759 Fig. 2 is a similar View showing a modiii'camounted in a. iiatposition, as "shown, ontop tion; Fig. 3 is a diagrammatic view-showing of the arm 1,71, bythe bracket 23",' on kthe the reavingjof the boom line; and Fig. 4 is a opposite side from the pivot 18 and prefervertical sectional viewr of the snubber'brace; f ably in a position somewhat lower thansaid t' :F5 As shown in the drawings, 10 indicates a pivot. After passing around the sheave 23a,

suitable platform of the ordinary type rothe line again goes back and up overantatably mounted by means of the turntable 11 other one of the sheaves 23, thence back, up on suitabletraction members, for example, the and around the other sheave 22, thence Vdown caterpillar track 12. The platform 10 is again,and-up over the third sheave 23, whence "30 adapted to support the driving machinery the line goes down parallel with the arm 17 1.80

(not shown), which may be any suitablemotor. Y over the same, with Vits end attached (as Numeral 13 indicates a suitable housing for shown in Fig. 1) .to one of the eyes, or holes, Y the mechanism mounted onthe platform l0, in the vplate 24. This wea-ving of the line 25 and the operator. v is diagrammatically shown in Fig. 3. Close @5 Pivotally attached at 14 to the front of the to the point-of attachment of the lower end platform lO'in the usual manner is a boom 15. of the line, the same maypass over one sheave Numeral 17 indicates a bucket-arm pivotof a double sheave 9 carried by a double arm, ally attached to the end of the boom 15 at 18, or bracket- 8, yattached to the lower endr of such point of attachment being a short disthe arm 17. f 14,0 tance below theupper end of the arm 17. The Numeral 26 indicates a loading line, at- 190 lower end of the arm 17 is forked as-indicated tached to the hitch plates of the .shovel 26,

by`17a, the prongs of the forks carrying pivotpreferably by means of a bridle chain 26". ally mounted therebetween a bucket 19 which Theother end of the loading'fline 26 passes may be' the general type of 'Page bucket now over the roller 27 and under the roller` 28,

f 45 in commonV use `in excavating apparatus. and thence is led to the winch, or winding' The pivot points at which the'bucket 19 is drinn 29 mounted on the platform V10. carried by the end-of the arm are indicated by Numeral indicates a dump line, having 20, 2O and these pivot points preferably are in its inner end attached at 31to' the lower end front of the center of gravity of the bucket. of a snubber brace 32, carried by the outer Numeral 21 indicatesk a frame'mounted on end of the boom 15.V This .dump line 30 passes 100 MEW-QL," i i over a. sheave 33, carried on the under side of the arm 17, thence over one sheave of the double sheave 9, carried at the lower end of the arm 17, and has its other, or outer, end attached to one of the holes, or eyes, in the plate 24.

Numeral 35 indicates a snubbcr chain h avin its inner end attached at 36 to the under si e of the boom, and its outer end attached at 37 to the under side of the arm 17, said chain passing over and connected to the snubbcr brace 32. This chain is of such a length as t limit the extension or straighten# ing of the arm 17 on the pivot 18. For eX- ample, the limit of this movement may be as shown in Fig. 1 'in solid lilies. The snubbcr brace 32 is preferably provided with a telcscopic member 32 resting against a spring 32" in Order to provide a certain amount of ive or resiliency against jerks onl the dump me or snubbcr chain.

I shall now point out more particularly some of the advantages in the apparatusl shown over the apparatus of my prior patent above referred to.

VWith the reaving of the boom line as herein shown, it will be seen that the same passes over the tops of all three sheaves 23 on the upper end of the bucket arm 17. lVith this construction, the pull is in line with, or over the tops of said sheaves, and not in line with the center thereof, as shown in older forms of apparatus. This pull over the tops of said sheaves gives a better leverage in un- 'bending 0r extending the bucket arm, particularly in the upper positions of the boom 15, and permits a greater lift or extension of the arm 17.

It is to be noted also that the passing of the line 25 around the sheave 23a (in ii at position) on top of the arm 17 braces the arm. This sheave 23 may be mounted on the arm wherever the bracing is desired, and is here shown as, placed somewhat below a position directly opposite the pivot 18.

lIn the operation of the apparatus, the dumping of the bucket may be effected by proper slackening of tension on the loading line 26 in the manner described in my earlier patent, No. 1,724,104L above referred to, or the dump line alone may be relied upon to cause such dumping when the arm 17 is extended or straightened out to its limit. In such case, the dump line 30 is made with just sucient length so that it will become taut and dump the bucket when the arm 17 is eX- tended to its limit.

The construction and operation of the modified form of device shown in Fig. 2 are substantially the same as that already described, with certain exceptions that will be n noted.

cure by Letters Patent, is:

structure is substantially the same, and it might be said that Fig. 2 merely shows other manners of connecting or operating certain parts.

As shown in Fig. 2, the bracket 8 carried by the lower end of the arm 17 is provided with an extension 8, to the end of which the lower end of the boom line 25 is attached, instead of being attached to the plate 24 on the bucketlf). Vhen the boom line 25 is thus attached, dumping is not effected in the manner described in my earlier patent, No. 1,704,104, but such dumping is obtained solcly by means ofthe dump line 30, when the arm 17 reaches the limit of its extension. The outer end of this dump line 30fis attached to theplate 24, and the inner end maybe attached to the snubbcr 32 as shown in Fig. 1, or directly to the boom 15, as shown ini Fig. 2, said attachment being indicated by 30.

In the claims, when generally stating that the boom line is attached to the lower end of the bucket arm (without specifying that the same is attached directly totheai'm, or to the bucket) I mean to include such attachment as shownin both Fig. 1 andFigm2. That is, in speaking of such attachment, generally or broadly, I mean that the line is attached either directly to the arm, as shown in Fig. 2, or to the bucket, as shown in Fig. 1, in the latter' case, the attachment to the arm being effected through the bucket.

It is to be noted also that although I have shown the boom line 25 passed around the sheave 23 and its endattached to the lower end 'of the bucket arm, to provide two attachments to the bucket arm, such attachments could be reversed and the sheave provided at the lower end of thehuckct arm with the end of the line 25 attached to the bucket arm, at a point intermediate tbc cnds thereof.

While I have shown and described certain embodiments of my invention, it is to be understood that it is capable of many modifications. Changes, thercfore, inthe construction and arrangement may be made without departing from the spirit and scope of the invention as disclosed in the appended claims, in which it is my intention to claim all novelty inherent in my invention as broadly as permissible, in view of the prior art.,

lVhat I regard as new, and desire tosc- 1. Apparatus of the character described, including; a platform; a boom pivotally attached to the platform; a bucket arm pivotally attached to the outer end of the boom, said pivotal attachment being below the upper end of said bucketarm; a bucket mounted on the lower end of the bucket arm; a loading line attached tothe bucket; means on the platform for hauling in the loading line; a plurality of sheaves on the upper end of the bucket arm; a boom line leading from the .izo

platform over the tops only of all thesheaves on the upper end of the bucket arm, with its outer eiid attached to the'low-er end-of the bucketI arm; and means on the platform for hauling inthe boomline.

per end of said bucketr arm; a bucket mounted Y on the lower end of the b-ucket arm; a load-- ing line attached to the bucket; means on the:

platform for hauling in the loading line; a sheave supported on the platform; 'a plurality of sheaves on the upper end ofthe bucket arm; a boom line leading'from the platform over one of the sheaves on the upper end of the bucket arm, thence around a sheave mounted on the bucket arm between the ends thereof, thence backV over one of the'sheaves on the upper end of the bucket arm, thence around the sheave supported on the platform, thence over one of the sheaves on the upper end ofthe bucket arm, with its outer end attached to the lower end of the bucket arm; and means on the platformfor'hauling in the boom line. Y

3.r Apparatus of the character described, including; a platform; a boom pivotally attached to the platform; a bucket arm pivot# ally attached to the outer end of the boom,

Y said pivotal attachment being below the up* per end of said bucket arm; a bucket mounted on the lower end of the bucket arm; a loading line attached to the bucket; means on the platform for hauling in the loading line; a sheave on the upper end of the bucket arm; a boom line leading from the platform over the sheave on the upper end of the bucket arm, and so woven as to `provide two points of attachment to the bucket arm, one at the lower end thereof, and one at a point intermediate the ends thereof; and means on the platform for hauling in the boom line.

4. Apparatus of the character described, including; a platform; a boom pivotally attached to the platform; a bucket arm pivotally attached to the outer end of the boom, said pivotal attachment being below the upper end of said bucket arm; a bucket mounted on the lower end of the bucket arm; a loading line attached to the bucket; means on the platform for hauling in the loading line; a sheave supported on the platform; a plurality of sheaves on the upper end of the bucket arm; two boom line attachments to the bucket arm, one at the lower end thereof, and one at a point intermediate the ends thereof, one of said attachments carrying a sheave; a boom line leading from the platform over one of the sheaves on the upper end of the bucketarm, thence around the sheave carried by one of the boom line attachments on the bucket arm, thence back overfone of the, sheaves on the upper end .of

Vthe bucket arm, thence around the sheave supported on the platform, thence over one ofthe shea-veson the upper end of the bucket arm, with its outer end attachedto the other boom line attachment on the bucket arm; and means. on'` the platform for hauling. in .the

Vboom line; Y; o

*5. Apparatus-'asrclaimed in claiml, in e whichV the outer,y end of the boom line "is lattached directly Vto the klower end of the bucket arm. Y

'Apparatus-'as claimed in claim` 2, yin which thelouter end of the boom line isattachedfdirectly kto the lowerend of the bucket f 7; Apparatus as claimed in claim 3, in

which the attachment of the boom line at the lower' end of the bucket arm; is made directly to said lower end of said bucket arm.y

-8'..Apparatus as lclaimed in claim 4; in

`whicl'rthe attachment of the boom line fat the lowerend' of the bucket arm is made directly'to r saidflower endof said bucket arm. f

"9. Apparatus aslclaimed in claim 1,'in vwhich thebucket is pivotally mounted on the lower end of the bucket arm, and in which the outer end of the boom line is attached' to.r the bucket, tension on said boom lliney tend-k ingto rotatethe bucket to dumping position. 10. Apparatus as yclaimed* in claim 2, in which `the bucket is pivotally mounted onthe lowerl end yof the bucket arm, and in which the e outerl end of the boom line is attached to the`v A bucket, tension on said boom line tending to rotate 'the' bucket to dumping position.

l1. Apparatus as claimed in claim 3, .inv which the bucket is pivotally mounted on the lower end of the bucket arm; and in whichv one of the attachments of the boom line to thebucket arm is effected by means of attachment to thebuckehtension on said boom line tending tol rotate the' position. Y e l 212. VApparatus as vrclaimed in claim 4;"in

Awhich the bucket is pivotally mounted on the lower end of the bucket arm, and in which one of the attachments of the boom line to the-'bucket arm isfeffected by means of attachment to the bucket, tension onv said boom Y boom, said dump line operating to rotate the bucket to dumping position whenthe bucket arm is extending to a predetermined position.

14. Apparatus as claimed in claim 2, in

which'the bucket is pivotally mounted on thek bucket to dumping h.-lovfver end of Athie bucket arm, the outer end f the boom line attached directly to the lowyer end of the bucket arm, and a dump line provided connecting the bucket to the boom,

` said dump line operating to rotate the bucket to dumping position when the bucket arm is extended to a predetermined position.

15. Apparatus as claimed in claim', in which the bucket is pivotally mounted on the lower end of the bucket arm, in whichv the attachment of the boom line atthe lower end of the bucket arm is made directly to said `lowerend of said bucket arm, and a dump lineA provided connecting the bucket to the boom.` said dump line operating to rotate the bucket to dumping position when the bucket arml is extended to a pre-determined position.

16. Apparatus as claimed in claim 4, in

V which the bucket is pivotally mounted on the lower end of the bucket arm, in which the attachment of the boom. line at the lower end -ofithe'bucket arm is made directly to said lo'wer end of said bucket arm, and a dump A line provided connecting the bucket to the boom,v Said dump line operating to rotate the bucket to dumplng position when the bucket arm is extending to a predetermined position. v

17. Apparatus as claimed in claim 1, in

which there is provided a snubber chain c0n necting the bucket arm to the boom to limit the outward extension. of the bucket arm.

18.' Apparatus as claimed in claim 1, kin

'i 35 which there is provided av resilient snubber brace attached to theboom, and a snubber chain connecting the bucket arm to the boomto limit the outward extension of the bucket arm, said snubber chain passing over said snubber' brace. l

19; Apparatus as claimed in claim 4, in which there is provided a snubber chain connecting the bucket arm to the boom to limit the outward extension of the bucket arm.

20. Apparatus as claimed in claim' 4, in which there is provided a resilient snubber brace attached to the boom, and a snubber chain connecting the bucket arm to the boom to limit the outward extension of the bucket arm, said snubber chain passing over said snubber brace.

In witness whereof, I have hereunto set illy hand, this 3rd day of March. 1930.

` JOHN W. PAGE. 

